简单题解

#include<bits/stdc++.h>
using namespace std;
int main(){
string s;
int n;
cin>>n;
cin>>s;
for(int i = 0;i<n;i++){
if(s[i]>=97&&s[i]<=122){
s[i]-=32;
}
}
cout<<s;
return 0;
}